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Normen-DownIoad-Beuth-Kabdwa! Baok Intemational Plot No.179;0-42 Raigad CuHKdN’. 70428654ftIr.5476745an1-2011-09-26 09:55
Plastics — Methods for determining the
density of non-cellular plastics —
Immersion metho. d, Iiquid pyknometer
method and titration method
Plastiques — Méthodes de détehnination de la masse volumique des
plastiques non alvéolaires -
Parﬁe 1: Méthode par immersion, méthode du pycnomètre en milieu
liquide et méthode par titrage
a: E ISO 1183-1:2004(E)
<9 ISO 2004
Normen-DawnIoad-Bouthwabdwal Book Infamatîanal Ptot No. 1794:0442 Raigad C. .-KdNr‘. 7042865-Lmn5476745001-2011-09-26 09:55
ISO 1 1 83-1 :2004(E)
ISO (the International Organization for Standardization) ìs a worldwide federatìon of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally oarried out through ISO
technical committees. Each member body Interested In a subject for which a technicat committee has been
established has the right to be represented on that committee. Intemational organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISOcoIIaborates closely with the
Intemational Electrotechnical Commission (IEC) on aII matters of electrotechnìcal standardization.
Internatìonﬁal Standards are drafted in accordance wlth the ruIes given in the ISOIiEC Directives, Part 2.
The main task of technìcal committees is to preparo Intemationat Standards. Draft International Standards
adopted by the technical committees are cìrculated to the member bodies for voting. Publication as an
Intemational Standard requires approval by at Ieast 75 % 0t the member bodies casting a vote.
Attention is drawn to the possibìlity that some of the etements of this document may be the subject of patent
rights. ISO shall not be hetd responsìble for identifyìng any or aII such patent rights. .
ISO 1183-1 was prepared by TechnicaI Committee ISOl’I'C 61, Plastics, Subcommittee SC 5, Physical-
Together with the other parts (see below). this part of ISO 1183 cancels and replaces ISO 1183:1987, which
has been technically revised.
ISO1183 consiste of the foIIowing parts. under the generaI titIe Plastics — Methods for determining the
density of non-cellular plastics: -
—- Part‘ 1: Immersion method, Iiquid pyknometer method and titration method‘ A
— Part2: Density gradient column method
— Part 3: Gas pyknometer method
iv . o ISO 2'004 — Alt rights reserved
3 Terms and definitions
For the purposes of this document, the terms and deﬁnitions given in ISO 472 and the following apply.
quantity of matter contained in a body
NOTE It is expressed in kilograms (kg) or grams (g).
mass of a body obtained by measuring its weight using an appropriately calibrated balance
I NOTE It is expressed in kilograms (kg) or grams (g).
Normen-Downlnad-Beuth-Kabdwal Book lntematîanal Plot No.179;D—42 Raîgad ca-KdNr.7042865-L! Nr.5476745001-2011429-26 09:55
p . .
the ratio of the mass m of a sample to its volume V (a: the temperature t), expressed in kglm3, kgldm3 (g/ cm3)
or kgll (g/ ml)
NOTE _ - The following terms, based upon ISO 31-3, are given here for clariﬁcation.
Table 1 — Density terms
. kg/ m’
Density p mlV kgldm3 (g/ cm3)
kg/ Kg/ mt)
The test atmosphere shaII be in accordance with ISO 291. In general, oonditioning specimens to constant
temperature is not required, because the determination itself brings the specimen to the constant temperature
of the test.
Specimens which change in density during the test to such an extent that the change is greater than the
required accuracy shall be conditioned prior Io measurement in accordance with the applicable material
speciﬂcation. When changes in density with time or atmospheric conditions are the primary purpose of the
measurements, the specimens shaII be conditioned as described in the materia! speciﬁcation and, if no
material speciﬁcation exists, then as agreed upon by the interested parties.
2 o ISO 2004 - AII rìghls reserved
Normen-DownkzacbBeum-Kabdwal Book lntvemationa! Plol No.179;D-42 Raigad C. .-KdNr. 7042865-LfNI. 5476745001401 1-09-26 09:55
‘ 5.1 Method A ——— Immersion method
22.214.171.124 Analytìcal balance or instrument speciﬁcaliy designed for measurement of density,
accurate to 0,1 mg.
NOTE An automatically operating instrument may be used. The calculation of density may be done automatically
using a computer. —
126.96.36.199 Immersion vessel: a beaker or other wìde-mouthed containerof suitable size tor holding the
immersion Iiquid. ‘
188.8.131.52 Stationary support, e. g. a pan straddle, to hold the immersion vessel above the balance pan.
184.108.40.206 Thermometer, graduated at 0,1 °C intervals, covering the range 0 “C to 30 °C.
220.127.116.11 Wire (if required), corrosion-resistant, of diameter not greater than 0,5 mm, for suspending
specimens in the immersion Iiquid.
' 18.104.22.168 Sinker, of suitable mass to ensure complete immersion 0t the specimen, for use when the density
0_f the specimen is Iess than that of the immersion Iiquid.
22.214.171.124 Pyknometer, with a side-arm overflow capillary, for determining; the density of the immersion
‘Iiquid when this Iiquid is not water. The pyknometer shali be equipped with a thermometer graduated at 0,1 °C
intervals from 0 °C to 30 °C.
126.96.36.199 Liquid bath, capable of being thermostaticaily controlled to within i 0,5 °C. for use in determining
the density of the immersion Iiquid.
5.1.2 Immersion iiquid .
Use freshly distilled or deionized water or another suitable Iiquid containing not more than 0,1 % of a wetting
agent to help in removing air bubbles. The Iiquid or solution with which thespecimen comes into contact
during the measurement shaII have no eﬁect on the specimen.
The density of immersion tiquids other than distilled water need not be measured provided they are obtained
from an accredited source and are accompanied by certiﬁcate.
_ 5.1.3 specimens
specimens may be in any void-free form except for powder. They shaII be of a convenient size to give
adequate clearance between the specimen and the immersion vessel and should preferably have a mass of at
When cutting specimens from Iarger samptes, proper equipment shaII be used to ensure that the
characteristics of the material do not change. The surface of the specimen shaII be smooth and free from
cavìties to minimize the entrapment of air bubbles upon immersion-in the Iiquid, otherwise errors wiII be
188.8.131.52 Weigh the specimen in air while suspended with a wire or maximum diameter 0,5 mm. Weigh
specimens of mass Iess than or equal to 10 g Io the nearest 0,1 mg. Weigh those 0t mass greater than 10 g to
the nearest 1 mg. Record the mass of the specimen.
o ISO 2004 — AII rights reserved . 3
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m2 is the apparent mass, in grams, of the Iiquid required to ﬁIl the pyknometer containing the specimen;
L is the density of the immersion Iiquid at 23 °C (or 27 °C). in grams per cubic centimetre, as stated by
the supplier or determined as speoìfied in 184.108.40.206.
Perform the test on a minimum of three specimens and calculate the mean result to three decimal
places. ' '
5.3 Method C — Titration method
_220.127.116.11 Liquid bath (see 18.104.22.168).
22.214.171.124 Glass cylinder, of capacity 250 ml.
126.96.36.199 Thermometer, graduated at 0,1°C intervals, with a range suitable for measuring the test
188.8.131.52 Volumetric ﬂask, capacity 100 ml.
184.108.40.206 Flat-tipped glass rod stirrer.
Burette, capacity 25 ml, of a design which enables it to be kept in the liquid bath (220.127.116.11),
capable of dispensing 0,1 ml portìons of liquid. .
Required are two miscible Iiquids of different densities. One shall have a density just below that of the test
material and the other a density higher than that 0t the test material. Densities of various Iiquids are given in
Annex A as a guide. If necessary, carry out a rapid preliminary test in a few millilitres of the Iiquid.
The liquid with which the specimen comes into contact during the measurement shall have no effect on the
specimens shall be in a suitable void-free form.
18.104.22.168 By means of the volumetrie ﬂask (22.214.171.124), accurately measure 100 ml of the less dense
immersion Iiquid (see 5.3.2) into the clean, dry 250 mi glass cylinder (126.96.36.199). Put the cylinder into the iiquid
bath (188.8.131.52) controlled et 23 °C i 0.5 ‘C (or 27 °O : l: 0,5 °C).
184.108.40.206 Plaoe the pieces of the test specimen in the cylinder. They shall fall to_ the bottom and be free of
air bubbles. Allow the cylinder and its Contents to stabilize at the bath temperature, stirring at intervals.
NOTE _ - It is recommended that the thermometer (220.127.116.11) be kept permanently in the liquid. This makes it possible to
check that thermal equilibrium is attained et the time of measurement and, in particular, that the heat of dilution has been
18.104.22.168 When the temperature of the iiquid is 23 °C 10,5 °C (or 27 °C i 0,5 °C), add the more dense
immersion Iiquid millititre by millilitre from the burette (22.214.171.124). Stir the iiquid after each addition by means of
the glass rod (126.96.36.199), held vertically, and avoid producing air bubbles.
After each addition of the more dense liquid and mixing, observe the behaviour of the pieces of test specimen.
6 e ISO 2004 - All rights reserved